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Finding the Fourth Proportional to 143,472.90, 197,985.96 and 79,815

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Solution

The fourth proportional to 143,472.90, 197,985.96 and 79,815 is: 110,141.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,472.90 : 197,985.96 = 79,815 : x
  2. Step 2: Convert to fraction form
    143,472.90/197,985.96 = 79,815/x
  3. Step 3: Cross multiply
    143,472.90x = 197,985.96 × 79,815
  4. Step 4: Simplify right side
    143,472.90x = 15,802,249,397.40
  5. Step 5: Solve for x
    x = 15,802,249,397.40/143,472.90
  6. Step 6: Final answer
    x = 110,141.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.